Bug ID 553625: RST packet from BIG-IP after client sent zero window packet

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
10.2.4

Opened: Oct 21, 2015
Severity: 3-Major

Symptoms

When a BIG-IP proxied connection is being terminated, and the client is not accepting packets (zero window) then the connection may be reset after a timeout.

Impact

Drained packets from server may be lost if the client is not accepting them.

Conditions

In the following scenario: 1. TCP standard VIP receives all TCP payloads and FIN/ACK from server. 2. TCP standard VIP forwards TCP payloads(same size of client receive window) 3. Client sends zero window packet. 4. TCP profile used "fin wait 5", then after timeout, send RST to both client and server.

Workaround

None.

Fix Information

None

Behavior Change